A symptom is something the patient senses and describes, while a sign is something other people, such as the doctor notice. For example, drowsiness may be a symptom while dilated pupils may be a sign. The symptoms overall of motion sickness include nausea, vomiting, and dizziness (vertigo). Other common signs are sweating and a general feeling of discomfort and not feeling well (malaise). Mild symptoms are categorized as headache, mild unease and yawning.
Carbon dioxide is transported in the blood from the tissue to the lungs in three ways: (i) dissolved in solution; (ii) buffered with water as carbonic acid; (iii) bound to proteins, particularly haemoglobin.Approximately 75% of carbon dioxide is transport in the red blood cell and 25% in the plasma.arbon dioxide transport in the tissue is summarized in Figure 1. It combines with water to form carbonic acid. This reaction is very slow in plasma but fast within the red blood cell owing to the presence of the enzyme carbonic anhydrase.
It is then exhaled back into the atmosphere. Oxygen diffuses from the blood/tissue fluid into cells where it is used in respiration to release energy. Carbon dioxide diffuses back into the blood from cells as it is a waste product made during respiration. Source(s): AS biology student.Elfsong Â· 7 years ago.or O2 it is denoted as pO2 and pCO2 for carbon dioxide. CO2 diffuses out through the venous blood into the lungs (via alveoli) due to concentration gradient. Similarly pO2 which is high in concentration in the alveoli coming from outside the blood capillaries diffuses into lungs.